Wellspring Cave (Japanese: 地下水脈の穴Underground Waterway Opening) is a cave in Unova which lies north of Route 3.
When first entering the cave, the player and Cheren will encounter four Team Plasma members. Once the Single and Double Battle are won, the player and Cheren are told by Team Plasma that they plan to steal Pokémon in order to liberate them from humans, who according to the Plasma members, are making Pokémon suffer. Players can obtain TM46 (Thief), but cannot proceed through the cave without Surf. Flash is optional for the basement level.